If you play The Sims in any of its iterations, you know that Sims are almost always DTW (Down to Woohoo!). Here's where they can do it.
1. In bed.
2. In a special ~vibrating~ heart bed.
3. In various hot tubs, with the exception of one specific hot tub from The Sims.
4. In a car.
5. In the shower.
6. In a hammock.
7. In a tent.
8. In a changing room in a store.
9. In a photo booth.
10. In a sauna.
11. In an elevator.
12. In a helicopter, if you're feeling fancy.
13. In a tent while camping.
14. In a walk-in closet. Not a normal closet. Just a walk-in.
15. In your local military base.
16. In a science lab.
17. In a movie theater.
18. In your local city hall.
19. In the Vault of Antiquity, if you're into that.
20. In a mausoleum, perhaps with a sexy ghost.
21. In a film studio.
22. In a magical fairy greenhouse.
23. In a magical fairy regular-house.
24. In a sarcophagus, with potentially disastrous results.
25. In a time machine; see above.
26. In a trailer.
27. In a gondola.
28. In a haystack.
29. In a futuristic holo-subway car.
30. In a robot building pod.
31. In the air, with a jetpack, with another Sim who is also wearing a jetpack.
32. In a cave in the ocean, somehow without dying.
33. In a magician's vanishing box.
34. In a shower that is also a toilet.
35. In an igloo
36. In a wagon where you can also get your Sim's fortune told.
37. In a raked-up pile of leaves.
38. In a wardrobe of the magical variety.
39. In a hotel room.
40. In a rocket ship.
41. In an observatory.
42. In a hot air balloon.
43. In a treehouse.
44. In the local spa.